The black ones look like regular rectifier diodes, 1N4007 should be OK.
The two next to the big resistors are Zener diodes, 13V 1W (1N9648) IIRC.
The others? You will probably have to find someone who knows more about it than I.
Tom
It takes some specialized test gear (recently calibrated) to ensure that the gear meets it's published specs.
If you are doing work for yourself you can do as you please.
Tom
I think you will want some insulated (isolated) panel mount types that fit the rear panel holes without modification.
I don't have an 'M' here at the moment to measure.
They need to be isolated from the metal chassis as they have their own shield connection.
Tom
I like to replace any electrolytic capacitors in the direct audio signal path with film types. What the 'direct audio signal path' is exactly is up for debate.
Tom
No, that was just general information, those are what I call 'pre-drivers' as they are the driver for the driver transistors..
I will send you four new ON-Semi output transistors with theTO-66 drivers.
Tom
The circuit board that the balance controls are mounted on is frequently a problem on these. The 'griplets' or rivets that connect the traces on each side of the circuit board loose contact.
Tom